19 lines
485 B
JavaScript
19 lines
485 B
JavaScript
const visit = require('unist-util-visit');
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const is = require('hast-util-is-element');
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const source = require('unist-util-source');
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module.exports = function h1CheckerPostProcessor() {
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return (ast, file) => {
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let h1s = [];
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visit(ast, node => {
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if (is(node, 'h1')) {
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h1s.push(node);
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}
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});
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if (h1s.length > 1) {
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const h1Src = h1s.map(node => source(node, file)).join(', ');
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file.fail(`More than one h1 found [${h1Src}]`);
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}
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};
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};
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